Love seeing people sharing what they have learned about their health. Contrary to what the pharma owned corporate press would have you believe this is what we need more of. People taking responsibility for their health.
I've heard the arguments about the flawed use of these metrics for health for some time. Usually from engineers, very technically minded people, and doctors, yes doctors not rando dudes that like meat explaining how ketosis works. I recommend checking out Dr Ken Berry on this subject. Blind faith in the medical system is as foolish as blind faith in anything. You can't trust your doctor because you can't trust the system. Your doctor may just be following the "best practices". It might be 10 years until the system "realizes" how wrong they are. Or maybe the incentives are aligned for them to NOT learn. Regardless, its our bodies and health on the line. Don't blindly follow anyone's advice including Lopp or Doc Berry.